从卷组VG移除并删除物理卷PV

删除硬盘的过程简单如下：
从VG删除PV->删除PV->删除该硬盘上的LVM分区->拔掉硬盘

第一步，从VG删除PV
1.删除前，先确认要删除的PV所在的VG情况：

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[root@test ~]# vgdisplay -v     Finding all volume groups     Finding volume group "VolGroup00"   --- Volume group ---   VG Name               VolGroup00   System ID   Format                lvm2   Metadata Areas        2   Metadata Sequence No  7   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                2   Act PV                2   VG Size               390.53 GB   PE Size               32.00 MB   Total PE              12497   Alloc PE / Size       653 / 20.41 GB   Free  PE / Size       11844 / 370.12 GB   VG UUID               0UvEJz-rfLm-MVDb-20uW-JMCa-T14K-wCmyLO     --- Logical volume ---   LV Name                /dev/VolGroup00/LogVol00   VG Name                VolGroup00   LV UUID                fDHwa0-IUZV-no5O-RRJB-4N9o-U2MV-TAqucp   LV Write Access        read/write   LV Status              available   # open                 1   LV Size                15.00 GB   Current LE             480   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:0     --- Logical volume ---   LV Name                /dev/VolGroup00/LogVol01   VG Name                VolGroup00   LV UUID                cUjKA9-bI60-6R05-K0jS-MdXi-r26d-mfwU8X   LV Write Access        read/write   LV Status              available   # open                 1   LV Size                5.41 GB   Current LE             173   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:1     --- Physical volumes ---   PV Name               /dev/cciss/c0d0p3   PV UUID               6K7yBW-NuRf-3Quv-LU8U-6N1S-DmzG-ccCmbx   PV Status             allocatable   Total PE / Free PE    8122 / 7469     PV Name               /dev/cciss/c0d1p1 <--要从VG里移除的PV   PV UUID               TWzjBK-0N5x-1A6c-wht3-n4l1-7gFp-m24iy3   PV Status             allocatable   Total PE / Free PE    4375 / 4375

可以看到VG名为VolGroup00的最后那一段PV名字是/dev/cciss/c0d1p1就是我要从VG里删除的PV。

2.从VG删除PV

1 2	[root@test ~]#  vgreduce VolGroup00 /dev/cciss/c0d1p1   Removed "/dev/cciss/c0d1p1" from volume group "VolGroup00"

3.确认是否已经删除

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[root@test ~]# vgdisplay -v VolGroup00 | grep "/dev/cciss/c0d1p1"     Using volume group(s) on command line     Finding volume group "VolGroup00"

可以看到，VolGroup00里已经不包含名为/dev/cciss/c0d1p1的PV了。

第二步，删除PV
1.确认PV信息：

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[root@test ~]# pvdisplay   --- Physical volume ---   PV Name               /dev/cciss/c0d0p3   VG Name               VolGroup00   PV Size               253.82 GB / not usable 6.99 MB   Allocatable           yes   PE Size (KByte)       32768   Total PE              8122   Free PE               7469   Allocated PE          653   PV UUID               6K7yBW-NuRf-3Quv-LU8U-6N1S-DmzG-ccCmbx     "/dev/cciss/c0d1p1" is a new physical volume of "136.73 GB"   --- NEW Physical volume ---   PV Name               /dev/cciss/c0d1p1 <--我们要删除的PV   VG Name   PV Size               136.73 GB   Allocatable           NO   PE Size (KByte)       0   Total PE              0   Free PE               0   Allocated PE          0   PV UUID               TWzjBK-0N5x-1A6c-wht3-n4l1-7gFp-m24iy3

名为/dev/cciss/c0d1p1的就是我们要删除的PV。

2.删除PV

1 2	[root@test ~]# pvremove /dev/cciss/c0d1p1   Labels on physical volume "/dev/cciss/c0d1p1" successfully wiped

3.确认PV是否删除成功

1 2	[root@test ~]# pvdisplay | grep "/dev/cciss/c0d1p1" [root@test ~]#

可见，已经删除成功。

第三步，删除该硬盘(/dev/cciss/c0d1)上的LVM分区(/dev/cciss/c0d1p1)

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[root@test ~]# fdisk /dev/cciss/c0d1   The number of cylinders for this disk is set to 35139. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs    (e.g., DOS FDISK, OS/2 FDISK)   Command (m for help): p <--显示分区情况   Disk /dev/cciss/c0d1: 146.8 GB, 146807930880 bytes 255 heads, 32 sectors/track, 35139 cylinders Units = cylinders of 8160 * 512 = 4177920 bytes              Device Boot      Start         End      Blocks   Id  System /dev/cciss/c0d1p1               1       35139   143367104   8e  Linux LVM   Command (m for help): d <--删除分区 Selected partition 1   Command (m for help): p <--在显示分区情况，发现已经没了   Disk /dev/cciss/c0d1: 146.8 GB, 146807930880 bytes 255 heads, 32 sectors/track, 35139 cylinders Units = cylinders of 8160 * 512 = 4177920 bytes              Device Boot      Start         End      Blocks   Id  System   Command (m for help): w <--保存退出 The partition table has been altered!   Calling ioctl() to re-read partition table. Syncing disks.

好了，现在可以拔掉硬盘了或者拿来做爱做之事！